Of portsmouth



(No Model.)

T YORK DISH COVER.

No. 519,417. Patented May 8,1894.'

A F/G. 2.

F/GJ.

MW, n a.. WV,

UNITED STATES PATENT OFFICE.

n THOMAS YORKOF PORTSMOUTH, `OHIO.

DISH-COVER.

SPECIFICATION forming part of Letters Patent No. 519,417, dated May 8,1894. Application inea March 28,1894.. serial No. 505,451. (No man.)

To @ZZ whom it may con/cern.:

Be it known that I, THOMAS YORK, a citizen of the United States,residing at Portsmouth, in the county of Scioto and State of Ohio, haveinvented certain new and usefnllmprovements in Dish-Covers; and I dohereby declare thefollowng to be a full, clear, and eX- act descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to certain improvements in the dish cover shownand described in the Letters Patent of the United States, numbered508,198, issued November 7, 1893, to Robert Abbott and myself.

The object of the invention is to increase the power and efficiency ofthe cold air current by means of which the cooling of the contents ofthe dish combined with the cover is accomplished.

In the accompanying drawings: Figure l is an exterior elevation of adish and cover provided with my improvements; Fig. V2, a top plan of thedish, and Fig. 3, a vertical section showing the interior construction.

The parts reproduced from the Abbott and York patent, above mentioned,are designated by the same reference letters as in that patent.

Briefly stated, the improvement consists in carrying the aperture in theknob e of the aforesaid patent through the inner .wall c thereof, andaperturing the rim of the dish or vessel B, so that a draft may becreated, to cause the constant passage of air through the aperturesbelow into the dome of the cover A, and out through the aperture in theknob.

A represents the cover; b and c its outer and inner walls, respectively,and e the apertured knob.

the foot or stand of the dish, a free supply of air to the interior isassured. f

I have found, in the practical use of the patented invention, and of thepresent device, that the evaporationof the water through the porouswalls of the cover is hastened by the creation of a constant draft ofair within the dome by the means I have devised, and that the coolingeects are much improved, as against the original device of continin g asupply of air within the dome space and changing it only at intervals bylifting the cover, or by a slow process of escape and entrance.

The improvement which consists in providing the cover A with theaperture g in the inner wall thereof, and the dish B with the orificesh, in the manner described; for the purpose of creating a constantcurrent of air through the interior of the combined dish and cover,whereby Vthe cooling properties of the said apparatus are materiallyincreased.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS YORK.

Witnesses:

CHAs. E. MoLs'rER, WILLIAM L. PARKER.

